2026 ICD-10-CM Diagnosis Code A52Late syphilis

ICD-10-CM Codes›A00–B99›A50-A64›A52

ICD-10-CM A52
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A52 is a non-billable ICD-10-CM category code for late syphilis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A52.00, A52.01, A52.02, and A52.03.

Code Identity

ICD-10-CM Code
A52
Billable Status
No — Non-Billable Category
Code Describes
Late syphilis
Chapter
A50-A64
Infections with a predominantly sexual mode of transmission

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA50-A64Infections with a predominantly sexual mode of transmission
CategoryA52Late syphilis
This CodeA52Late syphilis

Specific Coding for Late syphilisOverview

Non-specific codes like A52 require more characters. Use one of these billable codes instead:

  • A52.0 for Cardiovascular and cerebrovascular syphilis

  • Use A52.00 for Cardiovascular syphilis, unspecified

  • Use A52.01 for Syphilitic aneurysm of aorta

  • Use A52.02 for Syphilitic aortitis

  • Use A52.03 for Syphilitic endocarditis

  • Use A52.04 for Syphilitic cerebral arteritis

  • Use A52.05 for Other cerebrovascular syphilis

  • Use A52.06 for Other syphilitic heart involvement

  • Use A52.09 for Other cardiovascular syphilis

  • A52.1 for Symptomatic neurosyphilis

  • Use A52.10 for Symptomatic neurosyphilis, unspecified

  • Use A52.11 for Tabes dorsalis

  • Use A52.12 for Other cerebrospinal syphilis

  • Use A52.13 for Late syphilitic meningitis

  • Use A52.14 for Late syphilitic encephalitis

  • Use A52.15 for Late syphilitic neuropathy

  • Use A52.16 for Charcot's arthropathy (tabetic)

  • Use A52.17 for General paresis

  • Use A52.19 for Other symptomatic neurosyphilis

  • Use A52.2 for Asymptomatic neurosyphilis

  • Use A52.3 for Neurosyphilis, unspecified

  • A52.7 for Other symptomatic late syphilis

  • Use A52.71 for Late syphilitic oculopathy

  • Use A52.72 for Syphilis of lung and bronchus

  • Use A52.73 for Symptomatic late syphilis of other respiratory organs

  • Use A52.74 for Syphilis of liver and other viscera

  • Use A52.75 for Syphilis of kidney and ureter

  • Use A52.76 for Other genitourinary symptomatic late syphilis

  • Use A52.77 for Syphilis of bone and joint

  • Use A52.78 for Syphilis of other musculoskeletal tissue

  • Use A52.79 for Other symptomatic late syphilis

  • Use A52.8 for Late syphilis, latent

  • Use A52.9 for Late syphilis, unspecified

Patient EducationClinical

Syphilis

Syphilis is a sexually transmitted infection (STI) caused by bacteria. It infects the genital area, lips, mouth, or anus of both men and women. You usually get syphilis from sexual contact with someone who has it. It can also pass from mother to baby during pregnancy.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A52Overview

Is A52 (Late syphilis) a billable code?

No. This is a category header that groups the codes for late syphilis, and headers cannot be submitted on claims. Claims for late syphilis need a more specific code from this category, such as A52.00, A52.01, and A52.02.